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1. What is the detailed interpretation of the two models “A10VSO28DFR1/31R-VPA12N00” and “A10VSO100DRS/32RVPB12N00-S1439”?
| Model Segment | A10VSO28DFR1/31R-VPA12N00 Explanation | A10VSO100DRS/32RVPB12N00-S1439 Explanation |
|---|---|---|
| A10VSO | Series Identifier: Axial Piston Variable Displacement Pump (Industrial-grade, high-pressure design for mobile and stationary hydraulic systems) | Same as left (Consistent series definition for A10VSO hydraulic pumps) |
| 28 / 100 | Nominal Displacement: 28 cm³/rev (cubic centimeters per revolution, indicating fluid volume displaced per shaft rotation) | Nominal Displacement: 100 cm³/rev (Larger displacement for high-flow hydraulic systems) |
| DFR1 / DRS | Control Type: D = Dual control (pressure + flow); FR1 = Hydraulic pilot control with pressure compensation (1st-generation optimized valve); R = Pressure regulation function | D = Dual control (pressure + flow); RS = Hydraulic pilot control with pressure compensation + speed-sensing auxiliary regulation |
| 31R / 32RV | Mounting & Rotation: 31 = SAE 3-bolt flange (SAE J744 Class 3); R = Clockwise rotation (viewed from shaft end) | 32 = SAE 4-bolt flange (SAE J744 Class 3); RV = Clockwise rotation with radial vibration-damping structure |
| VPA12N00 | Configuration Code: VP = Integrated pressure relief valve; A12 = Relief valve setting (280 bar); N00 = Standard factory calibration (no custom modifications) | PB12N00 = PB = Integrated pressure relief + backpressure valve; B12 = Relief valve setting (315 bar); N00 = Standard factory calibration |
| – | No additional code | S1439 = Production batch & quality traceability code (records manufacturing date, component batch, and inspection information) |
2. What are the core technical parameters of the two pumps?
| Parameter | A10VSO28DFR1/31R-VPA12N00 | A10VSO100DRS/32RVPB12N00-S1439 |
|---|---|---|
| Nominal Displacement | 28 cm³/rev | 100 cm³/rev |
| Maximum Working Pressure | 350 bar (5075 psi) | 350 bar (5075 psi) |
| Rated Working Pressure | 315 bar (4568 psi) | 315 bar (4568 psi) |
| Maximum Speed | 2800 rpm | 2200 rpm |
| Minimum Speed | 500 rpm | 500 rpm |
| Oil Viscosity Range | 10 – 400 mm²/s | 10 – 400 mm²/s |
| Recommended Oil Temperature | -20°C to +90°C (-4°F to 194°F) | -20°C to +90°C (-4°F to 194°F) |
| Oil Filtration Requirement | ≥ 10 μm (ISO 4406 Class 16/13) | ≥ 10 μm (ISO 4406 Class 16/13) |
| Shaft Diameter | 30 mm (1.18 in) | 45 mm (1.77 in) |
| Mounting Standard | SAE J744 (3-bolt flange) | SAE J744 (4-bolt flange) |
| Inlet/Outlet Port Size | Inlet: G1″, Outlet: G3/4″ | Inlet: G1 1/2″, Outlet: G1 1/4″ |
| Dry Weight | Approx. 22 kg (48.5 lbs) | Approx. 65 kg (143.3 lbs) |
| Volumetric Efficiency | ≥ 95% | ≥ 95% |
| Mechanical Efficiency | ≥ 92% | ≥ 92% |
3. What are the key differences between the two models?
- Displacement & Flow: The A10VSO100DRS (100 cm³/rev) has ~3.6 times the displacement of the A10VSO28DFR1 (28 cm³/rev), suiting high-flow systems (e.g., medium excavators) vs. the latter’s medium-low flow use (e.g., small loaders).
- Control Function: The A10VSO100DRS adds speed-sensing regulation (RS) for adaptive performance under variable-speed motor drives; the A10VSO28DFR1 uses basic pressure-compensated control (FR1) for stable load scenarios.
- Mounting & Vibration Resistance: The A10VSO100DRS has a 4-bolt flange (32RV) with radial vibration damping, ideal for high-vibration equipment; the A10VSO28DFR1 uses a 3-bolt flange (31R) for standard stability.
- Valve Configuration: The A10VSO100DRS integrates a relief + backpressure valve (PB) for system backpressure control; the A10VSO28DFR1 has a basic relief valve (VP) for overload protection.
- Traceability Code: Only the A10VSO100DRS includes S1439 for production batch tracking, facilitating quality management and maintenance.
